Siloxane-Terminated Side Chain Engineering of Acceptor Polymers Leading to Over 7% Power Conversion Efficiencies in All-Polymer Solar Cells
Artikel i vetenskaplig tidskrift, 2017

To investigate the influence of functional pendent groups on acceptor polymers and photovoltaic properties of all-polymer solar cells (all-PSCs), two novel acceptor polymers containing siloxane-terminated side chains are synthesized and characterized. Increasing the content of siloxane-terminated side chains can reduce pi-pi stacking distance and improve crystalline behavior, yet lead to poorer solubility of the acceptor polymers. By modulating the proper loadings of siloxane-terminated side chains on the acceptor polymers, the PBDB-T:PNDI-Si25 all-PSC attains a maximal power conversion efficiency (PCE) of 7.4% with an outstanding fill factor of 0.68. The results provide, new insights for developing high-performance all-PSCs through functional group engineering on the acceptor polymers, to achieve good solubility, polymer miscibility, and blend morphology.

performance

transistors

mobility

optimization

solvent

Polymer Science

morphology

conjugated polymers

transport

aggregation

orientation

Författare

S. Z. Feng

South China University of Technology

C. Liu

South China University of Technology

Xiaofeng Xu

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

X. C. Liu

South China University of Technology

L. J. Zhang

South China University of Technology

Y. W. Nian

South China University of Technology

Y. Cao

South China University of Technology

J. W. Chen

South China University of Technology

ACS Macro Letters

2161-1653 (eISSN)

Vol. 6 1310-1314

Styrkeområden

Building Futures

Fundament

Grundläggande vetenskaper

Ämneskategorier

Kemiteknik

Polymerteknologi

DOI

10.1021/acsmacrolett.7b00738